import random

klocki = [
            [
                [1,1],
                [1,1],
            ],
            [
                [1,1,1,1],
            ],
            [
                [0,1,0],
                [1,1,1],
            ],
            [
                [0,1,1],
                [1,1,0],
            ],
            [
                [1,1,0],
                [0,1,1],
            ],
            [
                [0,0,1],
                [1,1,1],
            ],
            [
                [1,0,0],
                [1,1,1],
            ],
        ]

def rand():
    return klocki[int(random.random()*len(klocki))]
